9 remote Blockchain contracts

Blockchain Developer

2 days ago
Job description

We are looking for developers to join a team of high qualifications and technical excellence for one of the most challenging projects in the Bitcoin and FinTech industry worldwide.

Our Mining Team is responsible for developing the node of the IOVlabs smart contract platform and seeks to incorporate experienced developers who:

  • Want to put into practice theoretical knowledge of Computing (from writing complex data structures to designing critical algorithms for network security and performance).
  • Have an interest in thinking and evolving the architecture of our software to make it robust and maintainable.
  • Value refactoring and continuously improve the code.
  • Enjoy writing code and working at a low level when necessary.
  • Our code is open-source, and the revision of changes is done publicly in Github. We are committed to contributing to the community and value those who like to do so.


  • Actively participate during the product design phases, analyzing requirements and proposing innovative and alternative solutions.
  • Collaborate on architecture definitions, always thinking of solutions that are scalable and secure.
  • Develop quality code, with emphasis on correctness of implementation.
  • Collaborate in the evolutionary maintenance of the product.
  • Design, document, automate and execute test plans.
  • Participate in the process of generating and analyzing user stories.
  • Skills, Knowledge & Abilities

  • Bachelor or advanced student of Computer Engineering, Computer Science, Information Systems or related careers.
  • Advanced knowledge in different programming languages. Mostly Java, C/C++, and Javascript/Typescript.
  • Knowledge about software architecture principles, performance, and software engineering best practices.
  • Knowledge and experience using design patterns.
  • Willingness to learn decentralized technologies and work on all layers of the stack.
  • Advanced English language proficiency.
  • Experience with agile and Scrum methodologies.
  • Proven experience in application development and evolution of the same product.
  • Work experience in development teams with an iterative approach, dividing long-term objectives into incremental milestones.
  • Ability to permanently learn from new technologies and work on a team with many diverse projects.
  • Bonus Points

  • Knowledge of blockchain technology
  • Computer security knowledge.
  • Knowledge of object-oriented programming and design patterns.
  • Have experience working for objectives with remote teams.
  • Have experience in static typing languages ​​especially Java.
  • Experience in non-relational databases (such as MongoDB).
  • Experience working with Test Frameworks like Chai, Mocha.
  • Benefits & Perks

  • Possibility of working with state of art technology in a challenging and unique project
  • 100% Remote working (contractor) from anywhere!
  • Laptop
  • Top tier compensation & bonus
  • Paid holidays
  • Get new remote Blockchain contracts sent to you every week.
    Subscribed to weekly Blockchain alerts! 🎉

    Senior Java Engineer / Blockchain

    1 month ago
    $75/hourRemoteMotion Recruitment

    An industry leading mortgage insurance and real estate company with a focus on tech, is looking to add a Senior Java Developer to one of their teams. The company is powered by technology, informed by data and driven to deliver new levels of service and innovation to their customers across the residential mortgage and real estate spectrum.

    In this position you will contribute to the ongoing development and support of a distributed web application that is part of a new digital platform. You will be responsible for translating business requirements into cost-effective solutions, designing and developing those solutions with minimal supervision, and troubleshooting and supporting production systems. This position will also participate in the ongoing effort to modernize and add new features to the new digital platform. You will also have the chance to work on Blockchain technologies.

    This position is on a contract to hire basis.

    Required Skills & Experience

  • 4+ years of experience
  • Java 8 or 11
  • Gradle
  • CI/CD
  • Microservices
  • Desired Skills & Experience

  • Kotlin
  • AWS or Azure
  • Bash
  • What You Will Be Doing

    Tech Breakdown

  • 90% Java and/or Kotlin
  • 10% Blockchain Technology (dependent upon prior experience)
  • Daily Responsibilities

  • 85% Hands On
  • 15% Gathering and Translating Business Requirements
  • The Offer

  • Competitive Pay: Up to $75/hour, DOE
  • Contract Duration: 6 Months to Hire
  • You will receive the following benefits:

  • Medical & Dental Insurance
  • Health Savings Account (HSA)
  • 401(k) with company match (immediately vested)
  • Paid Sick Time Leave
  • Pre-tax Commuter Benefit
  • 10% Annual Bonus
  • 3 weeks of PTO (not including floating holidays)
  • Potential for Remote Work
  • Paid Parental Leave
  • Applicants must be currently authorized to work in the United States on a full-time basis now and in the future.

    Posted By: Cassandra Benson

    Lead Software Engineer– Ethereum Blockchain - Opportunity for Working Remotely

    24 days ago

    Job Description

    Exciting opportunity for  a Lead Software Engineer– Ethereum Blockchain i n our Blockchain Engineering team. You will be working with a team of engineers dedicated to making the VMware Blockchain Platform the dominant Enterprise Blockchain solution.

    At VMware, we are building an Enterprise Blockchain with innovation, enterprise-grade capability, and solutions that will power blockchain in every market sector.

    You will work with a team of talented and supportive individuals from across the world as well as members of the academic community and VMware’s Research Group in this role. Our team values diversity, collaboration, and open thought while supporting VMware’s EPIC2 values.

    Are you ready for your next great challenge with the Blockchain Engineering team in VMware? 


  • Contribute to implementation of an enterprise blockchain solution. This includes but is not limited to work on the Byzantine Fault Tolerant State Machine Replication layer, work on the EVM execution engine and smart contract layer and work on the ledger layer.
  • Collaborate effectively with other engineers and researchers to solve complex problems
  • Collaboration with cross functional teams involved in the product delivery
  • Working with global team in different geographical locations
  • Requirements

  • Experience working on Blockchain platform and Ethereum technologies – must
  • Experience working on EVM execution engine
  • Deep understanding of distributed computing concepts in practice
  • Strong development experience in C++( v11 and higher) in Linux, preferred
  • Expertise in one of the following: security/cryptography, preferred
  • Proficient organizational skills with the ability to lead challenging demands
  • Ability to work independently and work collaboratively in a team environment, including quickly getting up to speed with new technologies.
  • Who you are:

  • Self Starter – Thrive in a fast paced and changing environment. 
  • Strong collaboration skills with a “Team First” mentality.
  • Technical engineering excellence, innovation in everything you do. 
  • “Growth” mindset in tackle problems and creating great solutions.
  • Excellent written and verbal communication skills 
  • 10+ years experience in an equivalent role
  • Bachelors/Masters in Computer Science or equivalent experience
  • JoinOCTO referral campaign

    Category : Engineering and Technology
    Subcategory: Software Engineering
    Experience: Business Leadership
    Full Time/ Part Time: Full Time
    Posted Date: 2021-04-21

    DApp developer for custom EVM

    4 days ago
    £470 - £570/day ( estimate)RemoteScope Personnel
    Telos is a Delegated Proof of Stake (DPoS) blockchain based on originally EOSIO source code, with fair token distribution and strong on-chain governance as unique selling points. Now Telos community has developed EVM-as-a-smart contract compatibility layer to attract existing Solidity/Vyper projects to the Telos blockchain.

    • Overview of Telos EVM
    • Release roadmap
    Telos Foundation is now looking for a blockchain engineer who can help to deliver and polishing Telos EVM to make it attractive for Solidity developers. The end goal is to have a JSON-RPC API compatible implementation of Ethereum on Telos mainnet.

    What we offer

    • Remote work on the timezone you choose
    • Flexible hours
    • A pure community lead project true in crypto spirit
    • Technically challenging scope of work
    • A negotiable salary based on your skill level
    • Open-source project with high peer recognition value
    • Colleagues in all cultures around the world
    What we expect from you

    • Able to deliver some of the items as described in Telos EVM roadmap
    • Able to coordinate with other community developers
    • Working 40 hours a week
    • Linux/macOS operating system experience
    • Solidity and Ethereum basic development skills
    • JavaScript frontend experience with React, Vue.js or others
    • Familiarity with open-source software development model, Github and such
    • Experience in writing test suites and utilising continuous integration services
    • Experience in writing developer documentation and blog posts
    • You actively use Dapps
    • You are actively involved in the cryptocurrency community
    Expectations are negotiable - if you are particularly strong in some areas, other developers can help you out in others.

    You will be paid in TLOS token, USDT or other crypto.

    Unreal Developer

    1 month ago

    Crucible is looking for an experienced, senior-level Unreal developer with extensive knowledge of the Unreal Engine to help us architect our codebase and help us develop our Emergence SDK. You’ll be working in the game dev world but also web3, with Avatars, Digital Fashion, NFTs, Self Sovereign Identity and more.

    You'll be working directly with the CTO and lead UI/UX designer as well as the Chief Avatar Officer to help complete features in the Agent UI, participate in testing and fix bugs.

    The work is mostly in Unreal UI, but includes a complex data system, integrations with blockchains and crypto wallets, NFTs and other protocols like, WebRTC, plugin development, 3rd party libraries like libindy and more. You don’t need to know or understand all this tech, just be able to work at a high level and like to learn new things - they key is what you can make UE4 do.

    We are open to engagement suggestions - we have project work and ongoing work at the moment, and are interested both in people who want contract work and those who are interested in later becoming part of the team.

    Come help us build the Agent interface for the Open Metaverse.


    Must have:

    • Advanced C++/Unreal Knowledge
    • Blueprints
    • Familiar with Unreal Engine UI (UMG/Slate)
    • 2+ years of Unreal Engine development experience
    • Able to work remotely and asynchronously

    Nice to have:

    • Advanced C++
    • Experience with using external libraries / dlls
    • Experience with sqlite
    • Plugin / Module creation
    • Shader programming
    • Familiarity with games / MMOs
    • Blockchain experience
    • Understanding of avatars / characters


    • Unreal Engine 4.25+
    • C++ / Blueprints
    • Visual Studio / VSCode / Rider / XCode
    • SQLite
    • Self Sovereign Identity (SSI) via Sovrin / Verity and libindy
    • Blockchains (Ethereum, Flow, others)
    • NFTs
    • Slack

    Senior Fullstack Engineer

    1 month ago
    £470 - £580/day ( estimate)RemoteConsensus Systems

    About ConsenSys

    ConsenSys is the leading blockchain software company. We enable developers, enterprises, and people worldwide to build next-generation applications, launch modern financial infrastructure, and access the decentralized web. Our product suite, composed of Infura, Quorum, Codefi, MetaMask, and Diligence, serves millions of users, supports billions of blockchain-based queries for our clients, and has handled billions of dollars in digital assets. Ethereum is the largest programmable blockchain in the world, leading in business adoption, developer community, and decentralized finance activity. On this trusted, open source foundation, we are building the digital economy of tomorrow.

    This role is part of ConsenSys Professional Services.

    At ConsenSys Professional Services, we work with the world’s leading Fortune 500 corporations and governments to design, develop and deploy blockchain platforms that create real business value. Our customers and partners include many of the largest global banks, Microsoft, the European Commission, komgo and Covantis. We work as an agile, globally integrated team of approximately 150 engineers, designers, consultants, architects, scrum masters and program managers.

    If you are someone that thrives in a fast-paced environment where being self-directed, determined, and resilient are a requirement, we would love for you to join us. To explore our products and solutions, visit !

    The role

    As a Senior Full Stack Engineer at ConsenSys you will join a world class technical team, with State of the Art expertise in developing & delivering advanced decentralized applications (Ðapps). You will join multinational agile teams working on Enterprise client projects, where you will be responsible for the delivery of front-end services, back-end services and/or blockchain smart contracts.

    Most of our team members have one area “deep” expertise (most often back-end development in Node.js / Typescript) as well as some generalist knowledge, and a willingness to learn more, in other areas (smart contract / blockchain development, front-end).

    The project team size & scope and your own responsibilities will vary from project to project. For example, you may play the role of a tech lead during a 3-month, 4 people project, or you may contribute to the delivery of a service within a much larger 30-50 people project during 12 months.

    As you gain more experience, you will be expect to contribute more in defining the technology vision of a project, enforcing best practice and training/coaching your team. You will also take part in the implementation of reusable product components and libraries that will be deployed by other ConsenSys teams around the world.

    Job requirements


  • 5+ years of experience as a Software Engineer working on Enterprise-grade projects
  • Mastery of one of the following disciplines: Back-end development: Typescript / Node.js (preference for Nest.js framework)Front-end development: React.jsBlockchain / smart contract development: Solidity / Ethereum, Web3.js or Ethers.js library
  • Experience with: PostgreSQL, MongoDB
  • Experience and/or willingness to learn about the other disciplines listed above
  • Experience working on agile projects in an Enterprise setting
  • Experience working in CI/CD setup
  • Experience with micro-services architectures
  • Bonus points for

  • BSc/MSc in Computer Science or related subject
  • Understanding of blockchain technology, especially Ethereum
  • General interest in DevOps topics / experience with Docker and/or Kubernetes
  • Experience with Kafka
  • Experience in deploying blockchain infrastructure
  • Other skills to demonstrate

  • Excellent verbal and written communication in English
  • Teamwork, flexibility, initiative, communication and organization
  • Willingness to constantly learn & improve, challenging yourself to stay at the top of your game
  • Location and work environment

    At ConsenSys Professional Services, we do our best to allow team members to work remotely, however this is not always possible when working on Enterprise client projects. We strive to take into account the personal circumstances of our team members, and in return we ask for your understanding and flexibility.

    We have physical offices in New York, Dublin, London, Paris and Hong Kong. Some of our team members work from home in other countries and cities.

    Occasional travel will be required for client meetings, and some projects may require being at the client’s location. On average this happens 20% of the time, but this can vary between 0% and 100% depending on the project and period.
    To be employed in a country, you need to have an existing employment visa in that country and speak the local language fluently.

    Why join ConsenSys?

    Here are some of the perks of being part of a unique organization like ConsenSys:

  • One of the most recognized tech companies in the blockchain ecosystem globally . A work experience at ConsenSys is a tremendous reference for your future career. ConsenSys alumni have moved on to become tech entrepreneurs, CEOs, and team leads at tech companies.
  • The forefront of a revolution . We fundamentally believe blockchain is a next generation of technology that can lay the foundation for a more just and equitable society. You can be a part of building the digital economy of tomorrow and radically transforming our society for the better.
  • A dynamic startup environment with deep roots . We are one of the earliest blockchain companies and a leader in the space. You’ll join a network of entrepreneurs and technologists that reaches the edge of our ecosystem.
  • Continuous learning and improvement . You’ll be constantly exposed to new concepts, ideas and frameworks from your peers and as you work on different projects — challenging you to stay at the top of your game.
  • ConsenSys is an equal opportunity employer. We encourage people from all backgrounds to apply. We are committed to ensuring that our technology is made available and accessible to everyone. All employment decisions are made without regard to race, color, national origin, ancestry, sex, gender, gender identity or expression, sexual orientation, age, genetic information, religion, disability, medical condition, pregnancy, marital status, family status, veteran status, or any other characteristic protected by law.

    Ruby Developer - Technologist

    1 day ago
    £450/dayRemoteOutside IR35Client Server
    Ruby Developer London to £450 p/day (outside IR35) Ruby Developer / Backend Software Engineer (Roda Git RDBS PostgreSQL) 6 month contract WfH.

    Make sure to apply with all the requested information, as laid out in the job overview below.

    High growth tech start-up is seeking a skilled Ruby Developer for a six month contract, working remotely but commutable to London.

    As a Ruby Developer you’ll be tackling interesting technical challenges utilising a cool tech stack which includes Ruby, Roda and JavaScript and libraries such as Dry-Rb and Rom-Rb.

    You will work closely with the CTO to help architect the company’s next generation platform.

    As the platform is still young, you will need to have a passion for product development and have a particular focus on integration and API development.

    The company is currently working with large investment banks, hedge funds as well as legal firms to deploy a unique solution and is enjoying continuous growth and success.

    There’s currently a remote interview and onboarding process as well as the ability to work from home; going forward there’s still lots of flexibility with only one day a week in the London office required from time to time.

    Requirements: Significant experience working with Ruby Good understanding of relational databases Working knowledge of Git Experience with Agile methodology (TDD, story writing, sprints) Keen to learn new technologies Excellent communication and collaboration skills Desirable: Roda, Blockchain, Dry-Rb, Rom-Rb Apply now or call 020 8016 4452 to find out more about this Ruby Developer / Backend Software Engineer opportunity.

    Job Role: Ruby Developer / Backend Software Engineer; Location: London / WfH; Rate; £400 to £450 p/day (outside IR35); Start: Immediate / ASAP; Term: 6 months

    Software Engineer Ruby SQL

    16 days ago
    £400 - £450/dayRemoteClient Server

    Software Engineer Ruby SQL

    Posted 1 day ago 2365

    London, England, £400 - £450 per day

    Managed by:

    Software Engineer / Backend Developer (RoR RDBS PostgreSQL) *6 month contract outside IR35*. High growth tech start-up is seeking a skilled Ruby Developer for a six month contract, working remotely but commutable to London.

    As a Software Engineer you'll be tackling interesting technical challenges utilising a cool tech stack which includes Ruby, Roda and JavaScript and libraries such as Dry-Rb and Rom-Rb. You will work closely with the CTO to help architect the company's next generation platform with a particular focus on integration and API development. The company is currently working with large investment banks, hedge funds as well as legal firms to deploy a unique solution and is enjoying continuous growth and success.

    There's currently a remote interview and onboarding process as well as the ability to work from home; going forward there's still lots of flexibility with only one day a week in the London office required from time to time.

    *Significant experience working with Ruby
    *Good understanding of relational databases, they use PostgreSQL
    *Working knowledge of Git
    *Experience with Agile methodology (TDD, story writing, sprints)
    *Excellent communication and collaboration skills
    *Desirable: Roda, Blockchain, Dry-Rb, Rom-Rb

    Full Stack Engineer (Golang/NodeJs) ( Indust...

    11 days ago
    Job details
    From $120,000 a year
    Job Type
    Number of hires for this role
      • Bachelor's (Preferred)

      • golang: 4 years (Preferred)

      • Node.js: 4 years (Preferred)

      • US work authorization (Preferred)

    Full Job Description

    Titan is a thriving start-up with an exciting road map! Bloq, Inc is a parent company, and together we build software and a pool for cryptocurrency miners. Titan Protocol is building a layer 0 hashrate routing protocol -- this will unlock and advance mining profitability by making Bitcoin hashrate a P2P tradable, liquid financial asset. As a mineable proof-of-work chain, Titan Protocol will enable the creation of new markets and new instruments.

    You'll be joining a small but scaling team of subject matter experts writing cutting-edge software powering tomorrow's financial infrastructure.

    Cryptocurrency experience, while attractive, is not required. What is of most importance is having solid experience writing efficient, scalable, secure, and robust software.

    About the role as a Senior Full Stack Developer on our team, you should know how to analyze

    complex, fast-moving system requirements. We are looking for an experienced full stack engineer

    that is a self-starter and highly competent. Must be a quick and willing learner,

    easy-going, flexible, and a skilled communicator. Specifically, you will need to have solid

    experience in:

    • 4-6+ years of solid experience
    • Full Life Cycle Experience
    • An expert with version control (git)
    • Golang, node.js (required)
    • C#
    • AWS
    • Bash
    • Terraform
    • Gitlab Issues

    We must see:

    • You can write clean, reliable, adequately tested code
    • You can think through all the steps required to develop the components of secure code, and won't need us to hold your hand.
    • Effective communication, interpersonal, time management and organizational skills with the ability to work in a fast-paced and deadline-oriented environment
    • Demonstrate professionalism, lead by example, have a strong work ethic and sense of duty in your work, strong problem-solving skills

    The right fit will thrive in a fun yet ambiguous start-up environment, be a bold self-starter who empowers others and ruthlessly prioritizes. You will be asked to hit the ground running and own your domain. Your input, suggestions and ideas make a huge impact- we welcome it!

    Our culture is that of low supervision but high expectations, good humor and quite a bit of meme sharing.

    Bonus Points if you...

    Bonus Points if you...

    • Bitcoin / Crypto RPC integration
    • Light-hearted with a good sense of humor
    • Can Roll up your sleeves and wear many hats
    • Have managed a team successfully
    • Like coffee


    • Our team is highly technical, motivated and bright. There is no better place to learn and geek out on blockchain, crypto, and mining.
    • Medical, dental,vision,life, disability, 401k,unlimited PTO, generous pay, bonus’

    Job Type: Permanent, Full-time, (will consider contract to hire) 100% remote

    Only qualified applicants need apply

    Job Types: Full-time, Contract

    Pay: From $120,000.00 per year


    • 401(k)
    • Dental insurance
    • Disability insurance
    • Flexible schedule
    • Health insurance
    • Life insurance
    • Paid time off
    • Parental leave
    • Vision insurance


    • 8 hour shift
    • Monday to Friday

    Application Question(s):

    • What is your salary expectation?
    • List projects or open source contributions here


    • Bachelor's (Preferred)


    • golang: 4 years (Preferred)
    • Node.js: 4 years (Preferred)
    • blockchain: 1 year (Preferred)

    Work Location:

    • Fully Remote